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Near- and far- stromal regions of the immature ovine mammary gland. Histolological section from the mammary gland of a nulliparous 18-month-old ewe lamb. Near-stromal regions (N) are within approximately 75 μm of mammary epithelial structures. Far-stromal regions (F) comprise both collagen rich connective tissue and adipose. Haematoxylin and eosin stain; scale bar: 50 μm
